Gorbachev, Shultz, Nunn, Perry Urge a Nuclear-Free World

DISARMING DISCUSSION: TIME's roundtable, which included former Soviet leader Gorbachev (third from left), agreed that greater cooperation between Washington and Moscow on nuclear weapons is vital

President Obama's call for a "world without nuclear weapons," and his agreement with Russian President Dmitri Medvedev to work towards just that, have helped revive an issue that slipped off the foreign-policy agenda following the end of the Cold War two decades ago. But nuclear disarmament hasn't been completely forgotten in recent years. In 2007, four diplomatic heavyweights  former U.S. Secretaries of State George Shultz and Henry Kissinger, former Secretary of Defense William Perry and former Chairman of the Senate Armed Services Committee Sam Nunn  made an impassioned plea for a nuclear weapons-free world. Shultz, Perry and Nunn, along...